How to twist particle hair guide along a curve?
A Force Field of type Curve Guide can bend particles along a curve. The force field globally affects all particles systems and all particles. But you can limit the influence in the Particle Settings &gt; Field Weights &gt; Effector Collection. Select an empty collection to exclude all force fields.
Let's say you want to make pigtails. For this, you need 2 particle systems (for left and right), 2 density groups, and 2 collections each with one Curve Guide force field in it.